1. Name the blood vessel which carries blood away from the kidney.
2.What part of the brain controls temperature regulation in the body?
3.Name the process in mammal during which Urea is formed.
4. In the test for starch why is the green leaf boiled in (a) water; (b) alcohol?
5. Name four parts of the mammalian alimentary canal.
6 State two features which are peculiar to the atlas vertebra
7. Name three diseases which can affect the kidney of man
8 Use the diagram below to answer questions (a) to (c) (a) (i)Name the structure illustrated above (ii) State the organ in which it is food
(b) Name the parts labeled HV (c) Name the fluid that is found within the parts of the structure labeled I – V
10. List the media of transportation of nutrients in: (a) Paramecium (c) invertebrates, (d) mammals
11. State two features which classify the rhizome as an underground stem.
SECTION B
Answer all the questions
12. You are provided with 10cm\(^3\) of water and a few crystals of potassium permanganate. Take two crystals with a spatula, bring the spatula close to the surface of tho water and gently drop that crystals into the water Do not stir the water or shake the test tube. (a) Carefully observe the set- up and record your observations as follows () Immediately after dropping the crystals into the water (i) after 5 minutes (ii) after 10 minutes (iv) after 15 minutes.
Copy the table below into your answer booklet and use it in recording your observations.
|
Time |
Observation |
|
Immediately after dropping the crystals |
|
|
After 5 minutes |
|
|
After 1O minutes |
|
|
After 15 minutes |
(b) What physical process must have given rise to the observations made? (c) State three physiological processes in organisms in which this phenomenon occurs
(ii) Why is it not advisable to stir the water or shake the beaker in this experiment?
13. (a) identify specimen. A and B (b) What type of skeleton has specimen A? (c) What is this skeleton made of? (d) From what group of animals can specimen B be collected? (e) From what part of the animal is it found? (f)(i) Make a labeled drawing 8 to 12 cm long of the anterior view of specimen B (ii) Give one function each of any three of the labeled parts.
14. Specimen C is a plant immersed in ink solution. Cut a thin cross section of the stem from at least 1 cm away from the ink mark upwards. Place the cut section in a Petri dish or transparent piece of glass or watch glass. Observe the cut section with a hand lens (a) Make a labeled drawing 8-10 cm in diameter of the cut surface to show with a distribution of tissues in the specimen (b), Shade all the stained tissues with horizontal strokes (c) Name two materials that are transported by the shaded tissues (d) Name three physical processes which help the transportation of materials from the soil to the leaf of the plant.
Explanation
1. Renal vein
2. Hypothalamus
3. Deamination.
4. (a) In the test for starch, the green leaf is boiled in water (i) to kill the protoplasm (il) to soften the leaf (ii) to burst open the starch granules (b) Boiled in alcohol to remove the chlorophyll
5. (a)The mouth (b) The gullet or oesophagus (C) The stomach (d) The small intestine
6. (i) Possession of large neural canal (i) Possession of two large facets for articulation with the skull (in) Possession of reduced or no centrum
7. Alkaloid, tannin, gums.
8. Kidney stones, diuresis, nephritis.
9. (a) (i) The inner ear of mammal (ii) The structure can be found in the mammalian ear (b) Semi-circular canals (ii) Ampullae (ii) Utriculus (iv) Sacculus.
10. (a) Paramecium cytoplasm (b) Plants-cell sap (c) Invertebrates-body fluid (d) Mammals -blood and lymph al buds.
11. (i) Possession of nodes and internodes (ii) Possession of adventitious roots (iii) Possession of terminal buds.
SECTION B
|
TIME |
OBSERVATION |
|
Immediately after dropping the crystals |
Streak of purple colour going down to the bottom of the beaker |
|
After 5 minutes |
The crystals have started to dissolve with deep colour at the bottorn |
|
After 10 minutes |
Thick purple at bottom, light purple in the middle and very light purple on top |
|
After 15 minutes |
Whole water is purple |
(b) The physical process is diffusion (c) (i) Exchange of gases in organisms (i) Absorption of digested food through the villi of small intestine (ii) Absorption of carbon (iv) oxide during photosynthesis (d) Stirring will interfere with the rate of diffusion and therefore the various stages cannot be observed.
13. (a) Specimen A - Grasshopper, Specimen B Mammalian thoracic vertebra (b) Exoskeleton (c) Chitin (d) Vertebrates (e) Thoracic cavity in the vertebral column (1) Neural canal for passage of spinal cord. The transverse process for the articulation With the ribs. The neural spine for attachment of muscles.
(c) (i) Water (ii) Mineral sats (d) (i) Transpiration pull (i) Dffusion (ii) The root pressure
